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GET /api/patches/2223946/?format=api
{ "id": 2223946, "url": "http://patchwork.ozlabs.org/api/patches/2223946/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/db8d9a0ea83315a128671ad93f4a77c5bb7ed224.1776340676.git.saviram@nvidia.com/", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/projects/15/?format=api", "name": "Ubuntu Kernel", "link_name": "ubuntu-kernel", "list_id": "kernel-team.lists.ubuntu.com", "list_email": "kernel-team@lists.ubuntu.com", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<db8d9a0ea83315a128671ad93f4a77c5bb7ed224.1776340676.git.saviram@nvidia.com>", "list_archive_url": null, "date": "2026-04-16T12:14:06", "name": "[SRU,N:linux-bluefield,v1,2/2] UBUNTU: SAUCE: vfio/pci: Use the correct ref count", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "5b89cf6dbfaf70d800a79f80058caaf98885b055", "submitter": { "id": 91107, "url": "http://patchwork.ozlabs.org/api/people/91107/?format=api", "name": "Stav Aviram", "email": "saviram@nvidia.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/db8d9a0ea83315a128671ad93f4a77c5bb7ed224.1776340676.git.saviram@nvidia.com/mbox/", "series": [ { "id": 500146, "url": "http://patchwork.ozlabs.org/api/series/500146/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=500146", "date": "2026-04-16T12:14:04", "name": "UBUNTU: SAUCE: vfio: Export vfio device get and put registration helpers", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500146/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2223946/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2223946/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<kernel-team-bounces@lists.ubuntu.com>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=VgKOt724;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; 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helo=mail.nvidia.com; pr=C", "permerror client-ip=52.101.52.2;\n envelope-from=saviram@nvidia.com;\n helo=BL2PR02CU003.outbound.protection.outlook.com" ], "From": "Stav Aviram <saviram@nvidia.com>", "To": "<kernel-team@lists.ubuntu.com>", "Subject": "[SRU][N:linux-bluefield][PATCH v1 2/2] UBUNTU: SAUCE: vfio/pci: Use\n the correct ref count", "Date": "Thu, 16 Apr 2026 15:14:06 +0300", "Message-ID": "\n <db8d9a0ea83315a128671ad93f4a77c5bb7ed224.1776340676.git.saviram@nvidia.com>", "X-Mailer": "git-send-email 2.47.0", "In-Reply-To": "<cover.1776340676.git.saviram@nvidia.com>", "References": "<cover.1776340676.git.saviram@nvidia.com>", "MIME-Version": "1.0", "X-Originating-IP": "[10.126.230.37]", "X-ClientProxiedBy": "rnnvmail202.nvidia.com (10.129.68.7) To\n rnnvmail201.nvidia.com (10.129.68.8)", "X-EOPAttributedMessage": "0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "DS2PEPF000061C7:EE_|DM4PR12MB6255:EE_", "X-MS-Office365-Filtering-Correlation-Id": "040d121a-de0e-4a81-d81b-08de9bb1c170", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "BCL:0;\n ARA:13230040|376014|36860700016|82310400026|1800799024|13003099007|22082099003|56012099003|18002099003;", "X-Microsoft-Antispam-Message-Info": "\n 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", "X-Forefront-Antispam-Report": "CIP:216.228.117.160; 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Ip=[216.228.117.160];\n Helo=[mail.nvidia.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n DS2PEPF000061C7.namprd02.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "DM4PR12MB6255", "X-BeenThere": "kernel-team@lists.ubuntu.com", "X-Mailman-Version": "2.1.20", "Precedence": "list", "List-Id": "Kernel team discussions <kernel-team.lists.ubuntu.com>", "List-Unsubscribe": "<https://lists.ubuntu.com/mailman/options/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=unsubscribe>", "List-Archive": "<https://lists.ubuntu.com/archives/kernel-team>", "List-Post": "<mailto:kernel-team@lists.ubuntu.com>", "List-Help": "<mailto:kernel-team-request@lists.ubuntu.com?subject=help>", "List-Subscribe": "<https://lists.ubuntu.com/mailman/listinfo/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=subscribe>", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "kernel-team-bounces@lists.ubuntu.com", "Sender": "\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>" }, "content": "From: Amir Tzin <amirtz@nvidia.com>\n\nBugLink: https://bugs.launchpad.net/bugs/2148554\n\nCited patch, on its cleanup flows, fails to clear the vfio device\nrefcount. Instead it calls vfio_put_device triggering [1].\n\n[1]\n[] Call trace:\n[] refcount_warn_saturate+0x140/0×238\n[] kobject_put+0x12c/0×160\n[] put_device+0x20/0×58\n[] vfio_pci_dma_buf_release+0x60/0×98 [vfio_pci_core]\n[] dma_buf_release+0x4c/0xc8\n[] dentry_kill+0xec/0×210\n[] dput+0x94/0×110\n[] fput+0xd8/0×318\n[] fput_sync+0x78/0xb0\n[] arm64_sys_close+0x44/0xa0\n[] invoke_syscall+0x7c/0×130\n[] el0_svc_common.constprop.0+0x4c/0×140\n[] do_el0_svc+0x28/0×58\n[] el0_svc+0x40/0×1c0\n[] el0t_64_sync+0x1b0/0×1b8\n[] el0t_64_sync_handler+0x148/0×158\n[] -[ end trace 0000000000000000 ]—-\n\nIssue: 4933425\nFixes: 25538ae6b589 (\"UBUNTU: SAUCE: vfio/pci: Allow MMIO regions to be exported through dma-buf\")\nSigned-off-by: Amir Tzin <amirtz@nvidia.com>\n---\n drivers/vfio/pci/dma_buf.c | 4 ++--\n 1 file changed, 2 insertions(+), 2 deletions(-)", "diff": "diff --git a/drivers/vfio/pci/dma_buf.c b/drivers/vfio/pci/dma_buf.c\nindex 0ad8545cbac5..d8c11816211f 100644\n--- a/drivers/vfio/pci/dma_buf.c\n+++ b/drivers/vfio/pci/dma_buf.c\n@@ -147,7 +147,7 @@ static void vfio_pci_dma_buf_release(struct dma_buf *dmabuf)\n \t\tdown_write(&priv->vdev->memory_lock);\n \t\tlist_del_init(&priv->dmabufs_elm);\n \t\tup_write(&priv->vdev->memory_lock);\n-\t\tvfio_put_device(&priv->vdev->vdev);\n+\t\tvfio_device_put_registration(&priv->vdev->vdev);\n \t}\n \tkfree(priv);\n }\n@@ -258,7 +258,7 @@ void vfio_pci_dma_buf_cleanup(struct vfio_pci_core_device *vdev)\n \t\tpriv->revoked = true;\n \t\tdma_buf_move_notify(priv->dmabuf);\n \t\tdma_resv_unlock(priv->dmabuf->resv);\n-\t\tvfio_put_device(&vdev->vdev);\n+\t\tvfio_device_put_registration(&vdev->vdev);\n \t\tdma_buf_put(priv->dmabuf);\n \t}\n \tup_write(&vdev->memory_lock);\n", "prefixes": [ "SRU", "N:linux-bluefield", "v1", "2/2" ] }